Individual holder
BLAIN ROY W
DE·5 granted patents·63 citations·filing 1984–1995
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0170US4637495APressure/viscosity compensated up travel for a hydraulic elevatorBLAIN ROY W·Filed 1985·Granted Jan 20, 1987·24 cites·7 claims
- 0252US4800990AThree speed valve control for high performance hydraulic elevatorBLAIN ROY W·Filed 1987·Granted Jan 31, 1989·14 cites·5 claims
- 0346US5593004AServo control for hydraulic elevatorBLAIN ROY W·Filed 1995·Granted Jan 14, 1997·11 cites·6 claims
- 0443US4601366ADown valve for the down speed control of a hydraulic elevatorBLAIN ROY W·Filed 1984·Granted Jul 22, 1986·9 cites·7 claims
- 0530US5232070AUp leveling control system for small elevatorsBLAIN ROY W·Filed 1991·Granted Aug 3, 1993·5 cites·7 claims
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